JPH0335141Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a replaceable toothbrush in which the tip of the brush having a flocked portion can be replaced.

[Problems that conventional technology and ideas try to solve]

Recently, people have begun brushing their teeth by preparing a set of different types of toothbrushes and switching to a different one depending on the area to be brushed. For this reason, a toothbrush for one person requires a fairly large amount of storage space, so each part - the handle and the tip - needs to be made smaller (compact). Previously, Jikko 54-
Replaceable toothbrushes have been proposed in No. 6615 and Japanese Utility Model Publication No. 50-126459, but because the locking protrusion that constitutes the locking and releasing mechanism has an angular shape, it has to be repeatedly inserted into the insertion hole of the handle. When inserted, it wears out and has a weak retaining force. Furthermore, when the handle is made smaller (compact), thinner and shorter, it has the disadvantage that it is difficult to grasp and add with the hand.

Therefore, the present invention solves the above-mentioned problems, and the pulling force connecting the tip of the brush and the handle does not change stably for a long period of time, and it can be used by repeatedly inserting and removing it. The purpose is to make it easier to apply force.

[Means to solve the problem]

In order to achieve the above object, the present invention has a locking force that is set to be larger than the pulling force applied when brushing teeth and smaller than the intentional pulling force when gripped by hand and pulled in the pulling direction. A replaceable toothbrush in which a gripping handle and a brush tip with a flocked part are removably connected via a locking and releasing mechanism having a locking and releasing mechanism, the brush tip having a square cross section or a rectangular insertion portion, and a leaf spring protrusion extending from the proximal end of the insertion portion and having a small mirror-shaped locking protrusion, and the gripping handle portion has a distal end portion thereof. A blind insertion hole having a square or rectangular cross section into which the insertion portion is inserted is bored in the hole, and a locking hole for locking the locking protrusion is formed downward from the inner part of the insertion hole. At the same time, a round-headed cap made of an elastic material is fitted from the outside of the locking hole.Furthermore, the locking and releasing mechanism is composed of the leaf spring protrusion, the locking protrusion, and the locking hole.

[Effect]

Since the locking force of the locking and releasing mechanism is set to be larger than the pulling force that is naturally applied when brushing teeth, the tip of the brush does not come off unexpectedly.
On the other hand, when you want to replace the brush tip, if you hold the brush tip by hand and intentionally pull it from the handle, the locking force of the locking and releasing mechanism is smaller than this intentional pulling force. , the brush tip can be easily pulled out and separated from the grip handle. When the insertion portion of the brush tip and the leaf spring protrusion are inserted into the blind insertion hole of the grip handle, the locking protrusion moves while slidingly contacting the inner wall of the insertion hole. Therefore, the plate spring protrusion moves inward while being elastically deformed, and when the locking protrusion and the locking hole are engaged, the plate spring protrusion returns to its original position with restoring force and grips the brush tip. It locks onto the handle. Further, since the cap with a round head is fitted from the outside of the locking hole, the insertion hole of the grip handle and the locking hole are sealed. If you place the thumb of your hand on this round head, it will be easier to apply pressure without slipping.

〔Example〕

In FIG. 1, reference numeral 1 indicates a gripping handle, and reference numeral 2 indicates a brush tip, which are connected to each other via a lock/release mechanism W so as to be freely inserted and removed.

The brush tip part 2 has a flat head part 3 and a bristle part 4 attached thereto, and an intermediate part 5 having a square or rectangular cross section as shown in FIG. 3, and a square cross section as shown in FIG. The rectangular insertion portion 6 and the plate spring protrusion 7 (fifth
(see figure).

The gripping handle 1 is formed of a substantially cylindrical body, and has a blind insertion hole 8 having a square or rectangular cross section at its tip, and has a tufted portion 4 extending downward from the inner part of the insertion hole 8. A circular locking hole 9 is provided through the side.

On the other hand, a small mirror-type locking protrusion 10 as shown in FIG. 2 is formed on the projecting piece 7 of the brush tip 2, and in the connected state as shown in FIG. The insertion portion 6 is tightly fitted near the opening of the blind insertion hole 8, and the locking protrusion 10 is locked in the locking hole 9.

Due to the resilient restoring force of the leaf spring protrusion 7, the locking protrusion 10 is reliably locked in the locking hole 9. In this way, the locking and releasing mechanism W is composed of the leaf spring protrusion 7, the locking protrusion 10, the locking hole 9, and the like.

The elastic force of this plate spring protrusion 7, the locking protrusion 10
Depending on the size and shape of the locking hole 9, the size of the locking hole 9, etc.
The locking force F shown in FIG. 1 can be set to a predetermined value. That is, this locking force F is the locking and releasing mechanism W.
This refers to the locking and holding force of

Therefore, this set locking force F is determined as follows. In other words, the locking force F is set to be larger than the pulling force A that is applied during normal use when brushing teeth, and the locking force F is set to be larger than the pulling force A that is applied during normal use when brushing teeth. Conscious pulling force B
Set smaller than .

That is, A<F<B... The following relational expression holds true.

By the way, as is clear from FIG. 1, the diameter of the locking hole 9 of the grip handle 1 is set to approximately 3 to 6 mm, so that the protrusion 10 cannot be pressed in the inner radial direction with fingers. It should be noted that if the plate spring protrusion 7 is pulled forcibly, so to speak, the leaf spring protrusion 7 will be elastically deformed inward and will come off the locking protrusion 10.

Next, a cap 12 with a round head made of an elastic material such as rubber or plastic is removably fitted into the locking hole 9, and the thumb C of the hand is inserted into the cap 12 when brushing the teeth, as shown by the imaginary line. If you press it against the round head,
It has the advantage of being easy to apply force, non-slip, and easy to polish. Furthermore, by making the color of the cap 12 different from that of the handle 1, it is possible to change the design.

Next, in FIG. 6 or FIG. 7, as the above-mentioned replaceable toothbrush, three brush tips 2, 2, 2 are combined with one grip handle 1 as a single set. , a portable item such as a travel bag is shown in a storage case 14. Depending on the area to be brushed, such as teeth and gums, and the purpose, the brush tip 2 can be selected and used. Alternatively, if one of the three flocked parts 4 becomes worn or bent after long-term use, use another one.

In addition, the brush tip 2 corresponding to one handle 1
The number of ... can be increased or decreased freely, and can also be set to 2, 4, or 5. Alternatively, a combination of one handle 1 and one tip 2 is also suitable as a travel set. Furthermore, the cross-sectional shape of the handle portion 1 may be freely shaped into an ellipse, a rectangle, a triangle, or the like.

[Effect of idea]

Since the present invention is constructed as described above, it produces significant practical effects as described below.

The locking and releasing mechanism W prevents the brush tip 2 from accidentally separating when brushing teeth.

By consciously pulling the brush tip 2 strongly with your hand, it can be easily pulled out and separated from the handle 1.

Since the shape of the locking protrusion 10 is a small mirror type, there is less wear when sliding inside the insertion hole 8.
The mutual locking force between the locking protrusion 10 and the insertion hole 8 is
Even if the tip part 2 is repeatedly inserted and removed from the handle part 1, there is no attenuation.

A cap 12 with a round head made of elastic material that fits into the locking hole 9 is used as a blind cap to seal the locking hole, and can also serve as a cap for contacting and pressing the thumb C. Sometimes it is easy to apply force, it does not slip, and it is easy to polish (see Figure 1).

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is an explanatory view showing the main parts of the locking/release mechanism W, Fig. 3 is a cross-sectional view taken from Fig. 1, and Fig. 4 is a sectional view of Fig. 1, Fig. 5 is a sectional view of the main part, and Fig. 6 is a sectional view of the main part.
This figure and FIG. 7 are front views showing the set state. 1...Grip handle, 2...Brush tip, 4...
Flocking part, 6... Insertion part, 7... Leaf spring protrusion part, 8
... Blind insertion hole, 9 ... Locking hole, 10 ... Locking protrusion, 12 ... Cap with round head.

Claims (1)

[Claims for Utility Model Registration] A lock having a locking force set to be larger than the pulling force applied when brushing teeth and smaller than the intentional pulling force when gripped by hand and pulled in the pulling direction. This is a replaceable toothbrush in which a gripping handle part 1 and a brush tip part 2 with a flocked part 4 are removably connected via a detachment mechanism W, and the brush tip part 2 has a cross section. The above-mentioned grip handle portion 1 includes a square or rectangular insertion portion 6 and a plate spring protrusion portion 7 extending from the base end of the insertion portion 6 and having a small mirror-type locking protrusion 10. A blind insertion hole 8 having a square or rectangular cross section into which the insertion portion 6 is inserted is bored at the tip thereof, and the locking protrusion 10 is inserted downward from the deep side of the insertion hole 8. A locking hole 9 for locking is provided through the locking hole 9, and a cap 12 with a round head made of an elastic material is fitted from the outside of the locking hole 9, and the locking and releasing mechanism W is connected to the plate spring projecting piece. 7, the locking protrusion 10, and the locking hole 9.